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    <title>Document</title>
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    <table>
        <tr><td>姓名</td><td>性别</td><td>年龄</td></tr>
        <tr><td>吴康升</td><td>男</td><td>20</td></tr>
        <tr><td>吴平</td><td>女</td><td>20</td></tr>
    </table>
    <h4>1.表头单元格</h4>
    <table align="center" border="1" cellpadding="0" cellspacing="100" width="200">
        <tr><th>姓名</th><th>性别</th><th>年龄</th></tr>
        <tr><td>吴康升</td><td>男</td><td>20</td></tr>
        <tr><td>吴平</td><td>女</td><td>20</td></tr>
    </table>
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